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my 87 gl wagon spfi was runnin fine. it had no radio so yesterday i took one out of a junker and put it in, worked fine. went to start car, cranked but would not fire. pulled coil wire and checked for spark.
no spark even though it ran perfect 1 hour before.

im good at changin parts but not diagnosing, so i put in a known good coil and a known good disty.
still no spark.
i put a test light on the positive side of the coil and it lights when i turn on the ignition, so i guess i got juice at the coil...

i am running out of ideas.

should i try to get error codes from ecu?
i know this has been asked but how do i hook up the ecu connectors? the haynes says to hook them up but does not say where they are or what to hook to what.

Thats right Mark, I forgot about that! You were the discoverer of that particular oddity a while back weren't you?

Additionally, check the rest of your fuses and your fusible links.(the links are in the black box attached to the coolant tank)

Snowstormer.. You're right. I am partial to fuel injection.. a lot of that has to do with me knowing a lot more about FI than carbs. The only way I would convert backwards is if I had no other option.

Of my last 25 or so cars, only 3 of them have been carb'd.. My 73 chevy truck, 69 Dart GTS and 56 Pontiac star chief.. had any of them come available in a Fuel injected setup, I probably would have changed them.

It's the stero install - These Soobs don't have much reserve amperage. My son's 87 GL wagaon had same prob 10min after installing new system. Too much of a drain, not enough juice for good spark. Un-hooked stero, -VROOOMM! Found better "hot" lead, all was well.
-Good Luck!!

I need to keep this post in my glovebox, no way will I ever remember that when it goes.....

one good way to remember it is simple.. i grew up with a test up my sleeve. Gevernally speaking, if a car has enough battery power to run the horn and the headlights without serious difficulties (the headlights would get dim and horn sound weird when both on at the same time) then it should be able to start.. so if you turning a key and getting nothing, thats the first thing i always do. if headlights and horn work, i know its not a dead battery (and that i need to smack the starter, and pray) so the horn has always been like a barometer to me anyhow.. when this info bubbled up, i latched it on to that group of brain cells and it found an instant home :- )